Ring main unit | ROCKWILL ELECTRIC/Manufacturer of recloser, load break switch, step voltage regulator, ring main unit, vacuum circuit breaker, electrical transformer, substation 

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Wengyang Industrial Zone,


Wenzhou City,


Zhejiang Province,


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Ring main unit


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The RMR series is completely insulated SF6 Ring Main Unit, This product is in conformity with the standards the GB/IEC standard and the design of a high safety combined switch cabinets.One of the main components of circuit breaker and load break switch, high technical level, superb technology, stable performance, safe and reliable operation.
RMR series SF6 Ring Main Unit will take several functional units and connecting busbar assembly in sealed SF6 gas box, without any live parts exposed, with advantages completely insulated , live parts maintenance free, small volume, compact structure,  convenient operation etc. . The stainless steel plate of cabinet with 3.0mm thick , which can effectively prevent moisture, corrosion caused by salt spray; Products passed the breaking and making test, dynamic thermal stability test, sealing test and mechanical test etc, the maximum guarantee the safety of persons and equipment. The cabinet is suitable for indoor and outdoor installation, and it is not affected by the external environment, with high performance of anti harsh environment
RMR series SF6 Ring Main Unit is widely used in industrial and civil ring network distribution system and power supply terminal, especially suitable for small Secondary distribution substation, urban residential district, and other places
1.1  Standards and specifications
2.2.1 Switchgear manufacture
The switchgear complies with the following specifications in accordance with relevant IEC publications:
----IEC62271-200                            ----IEC62271-100
----GB3804-2004                             ----GB3906-1991
----GB16926-1997                           ----GB/T11022-1999
2.3 Operating conditions
2.3.1 Normal operating conditions Design to relevant standard, with the following limit values: a)Air temperature: ±40℃; Daily average ≤25°C
b)Altitude above sea level: Maximum installation altitude: 4000m c)Wind: less than 35m/s;
d)Earthquake intensity: no more than 8 degrees;

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